System information sending method and apparatus

Abstract

A system information sending method and an apparatus. The method includes receiving, by a base station, at least one first uplink trigger signal in a first time-frequency resource group in a first radio frame, determining, based on a time-frequency resource of the at least one first uplink trigger signal, a time-frequency resource used for sending first system information, where a start location of the time-frequency resource of the first system information in time domain has a first time offset relative to a frame header location of a radio frame in which the first system information is located, and sending the first system information on the time-frequency resource of the first system information.

What is claimed is: 
     
       1. A system information receiving method, comprising:
 receiving, by a terminal device, first indication information from a network device, wherein the first indication information indicates trigger signal sequence information and a trigger signal time-frequency resource; 
 receiving, by the terminal device, second indication information from the network device, wherein the second indication information indicates a subframe type; 
 determining, by the terminal device, sequence information of an uplink trigger signal and a time-frequency resource of the uplink trigger signal according to the first indication information and the second indication information; 
 generating, by the terminal device, the uplink trigger signal according to the sequence information of the uplink trigger signal; 
 sending, by the terminal device, the uplink trigger signal on the time-frequency resource of the uplink trigger signal; 
 determining, by the terminal device, based on the time-frequency resource of the uplink trigger signal, a time-frequency resource group of system information; and 
 receiving, by the terminal device, the system information in the time-frequency resource group of the system information. 
 
     
     
       2. The method according to  claim 1 , wherein receiving the system information in the time-frequency resource group comprises:
 detecting, by the terminal device, the system information in the time-frequency resource group; and 
 receiving the system information in the time-frequency resource group in response to the system information being detected; and 
 wherein the method further comprises:
 resending the uplink trigger signal, in response to the system information not being detected. 
 
 
     
     
       3. The method according to  claim 1 ,
 wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal. 
 
     
     
       4. A system information receiving apparatus, comprising:
 a processor; and 
 a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
 receive first indication information from a network device, wherein the first indication information indicates trigger signal sequence information and a trigger signal time-frequency resource; 
 receive second indication information from the network device, wherein the second indication information indicates a subframe type; 
 determine sequence information of an uplink trigger signal and a time-frequency resource of the uplink trigger signal according to the first indication information and the second indication information; 
 generate the uplink trigger signal according to the sequence information of the uplink trigger signal; 
 send the uplink trigger signal on the time-frequency resource of the uplink trigger signal; 
 determine, based on the time-frequency resource of the uplink trigger signal, a time-frequency resource group of system information; and 
 receive the system information in the time-frequency resource group of the system information. 
 
 
     
     
       5. The apparatus according to  claim 4 , wherein the instructions to receive the system information in the time-frequency resource group include instructions to:
 detect the system information in the time-frequency resource group; and 
 receive the system information in the time-frequency resource group in response to the system information being detected; and 
 wherein the program further includes instructions to:
 resend the uplink trigger signal in response to the system information not being detected. 
 
 
     
     
       6. The apparatus according to  claim 4 , wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal. 
     
     
       7. The method according to  claim 1 , wherein resending the uplink trigger signal comprises:
 performing at least one of changing a format of the uplink trigger signal or increasing transmit power; and 
 resending the uplink trigger signal based on at least one the changed format or the increased transmit power. 
 
     
     
       8. The apparatus according to  claim 4 , wherein instructions to resend the uplink trigger signal include instructions to:
 perform at least one of changing a format of the uplink trigger signal or increasing transmit power; and 
 resend the uplink trigger signal based on at least one the changed format or the increased transmit power. 
 
     
     
       9. A system information sending method, comprising:
 sending, by a network device, first indication information to a terminal device, wherein the first indication information indicates trigger signal sequence information and a trigger signal time-frequency resource; 
 sending, by the network device, second indication information to the terminal device, wherein the second indication information indicates a subframe type; 
 receiving, by the network device, an uplink trigger signal on a time-frequency resource of the uplink trigger signal; 
 determining, by the network device, based on the time-frequency resource of the uplink trigger signal and the subframe type, a time-frequency resource group of system information; and 
 sending, by the network device, the system information in the time-frequency resource group of the system information. 
 
     
     
       10. The method according to  claim 9 ,
 wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal. 
 
     
     
       11. A system information receiving apparatus, comprising:
 a processor; and 
 a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
 send first indication information to a terminal device, wherein the first indication information indicates trigger signal sequence information and trigger signal time-frequency resource; 
 send second indication information to the terminal device, wherein the second indication information indicates a subframe type; 
 receive an uplink trigger signal on a time-frequency resource of the uplink trigger signal; 
 determine, based on the time-frequency resource of the uplink trigger signal and the subframe type, a time-frequency resource group of system information; and 
 send the system information in the time-frequency resource group of the system information. 
 
 
     
     
       12. The apparatus according to  claim 11 , wherein a time-domain resource of the time-frequency resource group of the system information is a time interval corresponding to the time-frequency resource of the uplink trigger signal.